【PROTECTION OF VEHICLES】Normal Auto power on and off with vehicle started and shutdown, effective protection of the car battery

Display：Speed+engine speed+Voltage+water temperature Simple and direct display, no reflection film, no Obstruction of sight, safer, more comfortable HUD Features： 1.According to your own needs, a variety of display modes can be handoff which can apply for cars in line with OBD II or EOBD (onboard automatic diagnostic system), Plug and Play; 2. Engine speed alarm, it contributes to shift gear in time to save fuel. 3. Flexible brightness adjustment, the brightness can be adjusted automatically or manually to reach the best state which is in harmony with the environment. 4. Automatic power on and off, starting with the vehicle starting, stopping with the vehicle stopping to protect the vehicle’s battery. 5. Real-time display
head mounted display
https://images-na.ssl-images-amazon.com/images/I/51IUUCFKBUL._SL160_.jpg